Make Stopwatch.ElapsedTime() a property and TimeSpan

OpenRA.Game/Support/Stopwatch.cs

@@ -1,6 +1,6 @@
 #region Copyright & License Information
 /*
- * Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
+ * Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
  * This file is part of OpenRA, which is free software. It is made
  * available to you under the terms of the GNU General Public License
  * as published by the Free Software Foundation. For more information,
@@ -13,14 +13,15 @@ namespace OpenRA.Support
 	public class Stopwatch
 	{
 		System.Diagnostics.Stopwatch sw;
-		public Stopwatch ()
+
+		public Stopwatch()
 		{
 			Reset();
 		}
 
-		public double ElapsedTime()
+		public System.TimeSpan Elapsed
 		{
-			return sw.Elapsed.TotalMilliseconds / 1000.0;
+			get { return this.sw.Elapsed; }
 		}
 
 		public void Reset()